Dry cell



Feb. 19, 1924' EAMJZB H. DE DLANETA DRY CELL Original Filed April 1,1920 Patented Feb. 19, 1924.

HAROLD m2. OLANETA, or new HAVEN,

REPEATING ARMS COMPAN or NEW commo'rrcor. 4

Original application filed April 1, 1920, Serial No. i a 1 1920. SerialK053753515.

To all whom it may concern Be it known that I, HAROLD on OLANETA, acitizen of the United States, residing in 5 out, .have invented certainnew and useful Improvements in Dry Cells, of which the following is afull, clear, and exact description. I v This invention relates todrycells, and is articularly applicable to those of the poo et orminiature type, such as commonly employed in connection withflash-lights, although the invention is not necessarily limited in thisrespect/ This-application is a division of my application-Serial No.370,610, filed April 1; 1920, and pertainsmore especiallyto the partswithin the" lower end arrangement of .of the zinc cup.

tion is to furnishan improved form of element for centering thecartridge of depolarizing material Within the lower end of the zinc'cup.

To these consists in the novel. features and combinations of partshereinafter described and claimed.

In the accompanying drawings: Fig. lis a vertical central section of adry cell embodying my improvements;

Fig. 2 is a similar view, with the bottom centering cup' shown inelevation;

Fig. 3 is a top plan view of the centering cup; i

ig. 4 is a bottom view of the centering 'cu a ldig. 5 shows the blankfrom which the centering cup is made.

In the cell shown in the drawing, the zinc cup 10 constituting oneelectrode contains a carbon pencil 11, which serves as the otherelectrode. The carbon electrode carries a depolarizing cartridge 12,consisting of suitable powdery or granular depolarizing material tampedabout the carbon in order to form a block or cartridge adhering to thesame. ably enclosed in a porous envelopcgsuch as a bag 13 ofcheese-cloth or the like. Be-

tween the side surface of the cartridge and the inner surface of theside wall of the zinc cup is a suitable electrolytic paste 14.

New Haven, New Haven County, Connecti-S as bymeans of a plug 16' of -inu'l v suitable proportions of 'cereal,;'sucl One of the primary objectsof the inven-' The cartridge is prefer-.

connno' rrcor, assrenon ,ro wmcnfnsrnn HAVEN, oonnncrrco'r, a'coaronnrton or DRY c LL.

370,610. Divided and. um applicatio sled may],

In the bottom ofthe z inccup isa' entering disk 15,,which will bereferred itofiir detail hereinafter. At the top "of the-zinc cap, thelatter is closed in an appropriate-1' "aniier,

fibre or other suitable material, t u ular nature and construction of--w'h1ch is not material so far as the present invention is concerned,the same being'claimed plication Serial No".. 321,068. On he pper end ofthe carbon electrodei 'd l is lie' nsual brass contact cap 17. a Thepaste-l' may contain, foii fiour;'."chlorid solution, such ajs zinchlorid for example; and an, amalgamatim I stance, .of which mercuricchloridfis n example. The activating electrolyte ISll consists of'asolution of ammonium which may be placed initi'allyfin larizingcartridgeor in the past or as may be desired. The bottom centering disk15 1s p P aflino The upper edge of-this sl, which is cupped and adaptedto tit aboutithd-lower end of the cartridge, is 'provided with cutoutportions, indentations or scallops 18, the purpose of which is toincrease the amount of paste and thereby the amount of electrolytecarried thereby which may act on the zinc cup and on the cartridge atthe lower portion of the cell. In other words, it is desirable toprovide a maximum area of contact between the paste and the can tridgeon the one hand, and between the .paste and the zinc on the other hand,without interfering in any way with the effective action of the cuppeddisk in centering the cartridge wit-h substantial accuracy in the bottomof the zinc cup. The centering function of the paper cup is important,as the zinc will be attacked unevenly if the layer of paste in contactwith the {same is not substantially uniform throughout the circumferenceof the cell. The paper cup shown in the drawings meets these conditionsadmirably, because the scallops orfcutout portions 18 permitconsiderable action of the electrolyte on the cartridge and zinc cup atthe lowermost part of the cell, while the upward projections on theflange of the paper cup intermediate these scallops or I v 4 ably-madeof paper,-impregnateifgwith and other ends, the invention tiltindentations secure a very eflicient centering of the cartridge.

- The Scalloped centering cup may be readily manufactured. It may beformed, for example, by cupping a disk-like paper blank 15, shown indetail in Fig. 5. This blank is cupped in a convenient manner, and inthe cupping operation suitable projections on the cupping tool arebrought down to engage the upper edge of the cup and thereb form thedepressions or scallops 18. In tlie preferred'practice, the depressionsor scallops are formed by bending or folding the paper at a number ofequally distant points, the depressions or scallops being produced ineffect by a crushing of the side Wall of the cup at those points. i I donot claim,herein the method of making the scalloped bottom centering cupfor the depolarizlng' cartridge, as the same is claimed'in my copendingapplication, Serial No. 392,287.

What I claim is:

-1. In a dry cell, a container, a depolarizing cartridge therein, and abottom centering cup for the cartridge, having a continuous stiffenedside wall with scallops formed therein.

2. In a dry cell, a container, cartridge therein, and a cup for centerinthe cartrid e in the bottom of the container, said iavin cup 2.continuous stiffened turned peripheral ange with centering projectionsOn its ed c.

3. A s allow centering cup for a dry cell cartridge having a bottofmanunyieldin peripheral wall upstanding therefrom, an

a plurality of centering projections formed ing a continuous side wallwith scallops or indentations in the upper edge thereof, a pasteinterposed between the cartridge and the side wall of thccup andsubstantially filling such scallops or indentations, and a closure forthe top of the cup.

6. In a dry .cell, a container, a cartridge therein, and centeringmember for the cartridge in the bottom of the container, said centeringmember consisting of a disk of flexible fibrous material having acontinuous wall generally perpendicular to the is r.

7. In a dry cell, a container, a cartridge therein, and a centeringmember for the cartridge in the bottom of the container, said centeringmember consisting of a disk of flexible fibrous material having acontinuous side Wall, with scallops or indentations in its upper edge.

In'witness whereof, I have ,hereunto set my hand on the 5th day of May,1920.

HAROLD DE OLANETA.

